CN100507977C - Map display device, map display method, and map display program - Google Patents
Map display device, map display method, and map display program Download PDFInfo
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- CN100507977C CN100507977C CNB2004800294739A CN200480029473A CN100507977C CN 100507977 C CN100507977 C CN 100507977C CN B2004800294739 A CNB2004800294739 A CN B2004800294739A CN 200480029473 A CN200480029473 A CN 200480029473A CN 100507977 C CN100507977 C CN 100507977C
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/36—Input/output arrangements for on-board computers
- G01C21/3667—Display of a road map
- G01C21/3673—Labelling using text of road map data items, e.g. road names, POI names
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Abstract
A map display area decision unit (262) decides an area for which a map is to be displayed. A road information acquisition unit (261) acquires bending point coordinate information and name information for the traffic route to be displayed in the display area decided, from the map data transmitted from the map data distribution server. A map display data generation unit (264) decides a display position at a position along the traffic route and evading an interference with the other character symbol for each character or symbol constituting the character symbol string indicated in the name information and generates map display data for displaying the character or the symbol at the position decided.
Description
Technical field
The present invention relates to map display, map-indication method and map display program
Background technology
As everyone knows, used map display, it is obtained by network, and the map datum distribution server sends, the name information that comprises the bending point coordinate information that is used on every traffic route showing this traffic route and traffic route is at interior map datum, and carries out map according to the map datum of obtaining and show.The traffic route is meant road and circuit etc.There are two kinds as this kind map display, a kind of is to obtain from the map datum distribution server under the situation of map datum in the raster data mode, directly shows the map video data of the name information that comprises the traffic route that obtains from the map datum distribution server.Another kind is that map display is obtained from the map datum distribution server under the situation of map datum in the vector data mode, generates and show the map video data of the name information that comprises the traffic route that disposes along the traffic route.
For example, publicity goes out the following technology of now using in the Non-Patent Document 1:
Receive map datum in the raster data mode from the map datum distribution server, directly the map datum of the name information that comprises the traffic route of display map data distribution server allocation.In addition, publicity goes out the following technology of now using in the Patent Document 1:
Generate and show on the map datum of obtaining in the vector data mode along the name information that contains the traffic route of traffic route configuration at interior map video data.In addition, publicity goes out the following technology of now using in the Patent Document 2:
The tetragonal viewing area of the name information that nearby generates the configuration traffic route of the traffic route on map datum, and in this zone display Name information.
Non-Patent Document 1: adopt the road name of PC browser to show example, [online] [putting down into retrieval on October 2nd, 15] internet＜http://www.mapquest.com/maill, adp 〉
Patent Document 1: the spy opens flat 7-182493 communique
Patent Document 2: the spy opens flat 7-244719 communique
Summary of the invention
Yet, though the existing name information that can show the traffic route with technology of Non-Patent Document 1, but all need rotate under the situation of demonstration at each literal, each symbol, have the huge problem of data volume of map datum along the bending point display Name information of traffic route.In addition, though the existing of Patent Document 1 can be along traffic route configuration and display Name information with technology, but with map on other name information situation about disturbing under, omit or mobile name information according to the degree of priority that is predetermined owing to have to, thereby exist and to show the problem of wanting the name information that shows.
In addition, though Patent Document 2 existing with technology can be on map datum circuit nearby generate the tetragonal viewing area of the name information of configuration traffic route, and in this viewing area, show, but can not be along each literal of bending point or each symbol ground display Name information of traffic route.In addition, under the situation about disturbing with other name information on the map, owing to have to according to the priority of traffic route, the traffic route that degree of priority is low moves to other viewing area, thereby exists and can not show the problem of wanting the name information that shows.
In addition, because the prior art of Non-Patent Document 1, Patent Document 1 and Patent Document 2 reckons without because of forked traffic route on the direct of travel or because of the handling problem of the map datum obtained, same traffic route is taken as different traffic routes and handles, repeat the situation of display Name information on the same traffic route, thereby existence hinders other name information, the problem that is difficult to clear demonstration.
The present invention puts forward just in view of the above problems, purpose is to provide a kind of map display, map-indication method and map display program, it can avoid interference, and eliminates and repeat to show, therefore can see the name information that shows the traffic route clearly easilier.
In order to address the above problem, realize purpose, map display of the present invention, it is obtained by network, and the map datum distribution server sends, the name information that comprises the bending point coordinate information that is used on every traffic route showing this traffic route and traffic route is at interior map datum, and carries out map according to the map datum of obtaining and show; It is characterized in that this map display comprises:
The viewing area determination device, the zone of its decision displayed map;
Acquisition device, it at the traffic route in the viewing area that should be presented at the determination device decision of aforementioned viewing area, obtains aforementioned bending point coordinate information and aforementioned name information from the map datum that aforementioned map datum distribution server sends;
Map video data generating apparatus, each literal of it is represented display position decision in constituting aforementioned name information letter symbol string or each symbol are along the position on the traffic route, and on the position of avoiding interfering, and on the position of decision, generate and be used for the map video data of display text or symbol with other letter symbol.
In addition, the present invention is a kind of map display, it is obtained by network, and the map datum distribution server sends, the name information that comprises the bending point coordinate information that is used on every traffic route showing this traffic route and traffic route is at interior map datum, and carries out map according to the map datum of obtaining and show; It is characterized in that this map display comprises:
The viewing area determination device, the zone of its decision displayed map;
Acquisition device, it at the traffic route in the viewing area that should be presented at the determination device decision of aforementioned viewing area, obtains aforementioned bending point coordinate information and aforementioned name information from the map datum that aforementioned map datum distribution server sends;
Map video data generating apparatus, its generation are used for showing along the traffic route map video data of the letter symbol string of representing in the aforementioned name information;
Aforementioned map video data generating apparatus is before being constructed for showing the data of the letter symbol string of representing in the name information corresponding with this traffic route along certain traffic route, judgement is in the viewing area of aforementioned viewing area determination device decision, the data that are used for showing the letter symbol string of representing in this name information whether have been generated, under the situation about having generated, be used for no longer then showing that the data of the letter symbol string of representing in the name information of this traffic route generate.
In addition, the present invention is a kind of map-indication method, it is obtained by network, and the map datum distribution server sends, the name information that comprises the bending point coordinate information that is used on every traffic route showing this traffic route and traffic route is at interior map datum, and carries out map according to the map datum of obtaining and show; It is characterized in that this map-indication method comprises:
The viewing area deciding step, the zone of its decision displayed map;
Obtain step, it at the traffic route in the viewing area that should be presented at the deciding step decision of aforementioned viewing area, obtains aforementioned bending point coordinate information and aforementioned name information from the map datum that aforementioned map datum distribution server sends;
The map video data generates step, each literal of it is represented display position decision in constituting aforementioned name information letter symbol string or each symbol are along the position on the traffic route, and on the position of avoiding interfering, generate and to be used for the map video data of on the position of decision display text or symbol with other letter symbol.
In addition, the present invention is a kind of map-indication method, it is obtained by network, and the map datum distribution server sends, the name information that comprises the bending point coordinate information that is used on every traffic route showing this traffic route and traffic route is at interior map datum, and carries out map according to the map datum of obtaining and show; It is characterized in that this map-indication method comprises:
The viewing area deciding step, the zone of its decision displayed map;
Obtain step, it at the traffic route in the viewing area that should be presented at the deciding step decision of aforementioned viewing area, obtains aforementioned bending point coordinate information and aforementioned name information from the map datum that aforementioned map datum distribution server sends;
The map video data generates step, and its generation is used for showing along the traffic route map video data of the letter symbol string of representing in the aforementioned name information;
The aforementioned map video data generated step before being constructed for showing the data of the letter symbol string of representing in the name information corresponding with this traffic route along certain traffic route, judgement is in the viewing area of aforementioned viewing area deciding step decision, the data that are used for showing the letter symbol string of representing in this name information whether have been generated, under the situation about having generated, be used for no longer then showing that the data of the letter symbol string of representing in the name information of this traffic route generate.
In addition, the present invention is a kind of map display program, it is obtained by network, and the map datum distribution server sends, the name information that comprises the bending point coordinate information that is used on every traffic route showing this traffic route and traffic route is at interior map datum, and carries out map according to the map datum of obtaining and show; It is characterized in that this map display program makes computer-implemented:
The viewing area determination procedure, the zone of its decision displayed map;
Obtain program, it at the traffic route in the viewing area that should be presented at the determination procedure decision of aforementioned viewing area, obtains aforementioned bending point coordinate information and aforementioned name information from the map datum that aforementioned map datum distribution server sends;
Map video data generator program, each literal of it is represented display position decision in constituting aforementioned name information letter symbol string or each symbol are along the position on the traffic route, and on the position of avoiding interfering, and on the position of decision, generate and be used for the map video data of display text or symbol with other letter symbol.
In addition, the present invention is a kind of map display program, it is obtained by network, and the map datum distribution server sends, the name information that comprises the bending point coordinate information that is used on every traffic route showing this traffic route and traffic route is at interior map datum, and carries out map according to the map datum of obtaining and show; It is characterized in that this map display program makes computer-implemented:
The viewing area determination procedure, the zone of its decision displayed map;
Obtain program, it at the traffic route in the viewing area that should be presented at the determination procedure decision of aforementioned viewing area, obtains aforementioned bending point coordinate information and aforementioned name information from the map datum that aforementioned map datum distribution server sends;
Map video data generator program, its generation are used for showing along the traffic route map video data of the letter symbol string of representing in the aforementioned name information;
Aforementioned map video data generator program is before being constructed for showing the data of the letter symbol string of representing in the name information corresponding with this traffic route along certain traffic route, judgement is in the viewing area of aforementioned viewing area determination procedure decision, the data that are used for showing the letter symbol string of representing in this name information whether have been generated, under the situation about having generated, then no longer be used for showing the data area of the letter symbol string of representing in the name information of this traffic route.
(invention effect)
The map display that the present invention relates to, map-indication method and map display program have and can avoid interference, and can eliminate and repeat to show, therefore can see the effect of the name information that shows the traffic route clearly easilier.
Description of drawings
Fig. 1 is the functional block diagram that the map display system of expression present embodiment 1 constitutes.
The illustration figure of Fig. 2 road Identification information corresponding tables that to be map display shown in Figure 1 receive from the map datum distribution server as the part of map datum.
The illustration figure of Fig. 3 road name corresponding tables that to be map display shown in Figure 1 receive from the map datum distribution server as the part of map datum.
Fig. 4 is map display shown in Figure 1 shows road name in rotating Roman character mode illustration figure.
Fig. 5 is map display shown in Figure 1 shows road name in rotating Roman character mode another illustration figure.
Fig. 6 is that map display shown in Figure 1 avoids constituting the literal of road name or the illustration figure of the interference between the symbol in the tentative storer of video data.
Fig. 7 is that map display shown in Figure 1 is set the illustration figure that judges with pixel coverage.
Fig. 8 is the process flow diagram of the road name display routine of expression map display shown in Figure 1.
Fig. 9 is the process flow diagram of the road name display routine of the i road shown in the further detailed displayed map 8.
Figure 10 is the functional block diagram that the map display system that relates to of expression present embodiment 2 constitutes.
Figure 11 is the illustration figure that the road name of map display shown in Figure 10 shows Identification Lists.
Figure 12 is map display shown in Figure 10 repeats to show road name on road illustration figure.
Figure 13 is map display shown in Figure 10 repeats to show road name on road another illustration figure.
Figure 14 is the process flow diagram of the road name display routine of expression map display shown in Figure 10.
Figure 15 is that map display shown in Figure 1 uses the Chinese character that can not rotate to show the illustration figure of road name.
Figure 16 is that map display shown in Figure 1 uses the Chinese character that can not rotate to show the another illustration figure of road name.
Figure 17 is the process flow diagram of the road name display routine of expression map display shown in Figure 1.
Embodiment
Describe the most preferred embodiment of the map display that the present invention relates to below with reference to the accompanying drawings in detail.Among embodiment 1, when road showed road name, the situation when avoiding road name to disturb was illustrated with regard to map display; Situation in embodiment 2 when avoiding that same road repeated display Name is illustrated.As other embodiment, be illustrated at last with regard to all variation.
(embodiment 1)
When explanatorily map display device is along road demonstration road name in present embodiment 1, the situation of avoiding road name to disturb.The formation of the map display system of present embodiment 1 at first is described.Fig. 1 is the functional block diagram that the map display system of present embodiment 1 constitutes.Just as shown in the drawing, map display system is made of the network of map datum distribution server 10, map display 20, connection map datum distribution server 10 and map display 20.
Map datum distribution server 10 is servers of map datum of allotting bending point coordinate, identifying information, the road name of the series of road that comprises the road on the display map data to map display 20.In addition, network 15 is the networks by wireless connections map datum distribution server 10 and map display 20.
Locating information receiver 230 is processors of obtaining the current locations such as longitude, latitude of map display 20 according to the locating information that receives from gps satellite, has gps antenna 231.Gps antenna 231 be receive frequency spectrum diffusion that gps satellite sends L-band or the antenna of the electric wave of S-band.
As shown in Figure 2, road Identification information corresponding tables is the table that makes road Identification information corresponding with the bending point coordinate of series of road.Particularly, the road of identifying information " road 1 " is that N bending point by bending point (x11, y11)～bending point (x1N, y1N) constitutes.Identical therewith, the road of identifying information " road 2 " is that N bending point by bending point (x21, y21)～bending point (x2N, y2N) constitutes.Though and all constitute on the road surface shown in this figure by N bending point, each blind turning quantity also can be different.In addition, as shown in Figure 3, the road name corresponding tables is the table that makes road Identification information corresponding with road name.Particularly, the road of identifying information " road 1 " is that the road of " YASUKUNI DORI (quiet state street) ", identifying information " road 2 " is " AOYAMA DORI (street, green hill) ".
Get back to the explanation of Fig. 1 below, display data memory 253 is storeies of the map video data of the storage reality corresponding with the display frame of display 220, for example is the coloured image storer of (320 pixels * 240 pixels).In addition, video data supplementary storage 254 is to store the storer that determines to be presented at the road name on the display data memory 253, particularly, be to be used for checking that decision is presented at the road name on the display data memory 253 and is presented between the road name on the tentative storer 255 of video data temporarily glitch-free storer is arranged.It for example is the black white image storer of (320 pixels * 240 pixels).In addition, can the tentative storer 255 of video data be the provisional storeies that temporarily show road name in order to confirm road name dispose, and for example have the storer specification about (100 pixels * 100 pixels).
Map display area resolver 262 is according to the map datum around the current location of the map display of obtaining by locating information receiver 230 20, the processor of the viewing area that decision should show.In addition, road shows determinant 263 is whether the bending point coordinate of judging the series of road corresponding with obtain identifying information that device 261 obtains by road information is present in the determinant in the viewing area that determines by map display area resolver 262.
Map video data maker 264 is showing that by road bending point coordinate that determinant 263 is judged to be the series of road of road is under the situation in the viewing area, by line between the bending point coordinate of series of road, demonstrate road, when each literal of the road name of the road of avoiding representing demonstrating or other identification title on each symbol and the map datum take place to disturb, generate and contain along the road name of road configuration processor at interior map video data.
Map video data maker 264 is under the situation of each literal that can make the demonstration road name or the rotation of each symbol, avoid showing when each literal of road name or other identification title on each symbol and the map datum are disturbed, generate the map video data of the road name that comprises left-to-right configuration along road from display frame.Example when showing road name with regard to the rotating Roman character of map display shown in Figure 1 20 usefulness herein is as with explanation.
Fig. 4 is the exemplary plot that the rotating Roman character of map display 20 usefulness shown in Figure 1 shows road name.Fig. 5 is the another exemplary plot that the rotating Roman character of map display 20 usefulness shown in Figure 1 shows road name.As Fig. 4, shown in Figure 5, map video data maker 264 shows under the situation of road name with the Roman character in " YASUKUNI DORI (quiet state street) ", " MEIJI DORI (Mingzhi street) " and so on, irrelevant with the relative position of road name in the display frame, always from left to right show along blind turning.
The display direction of the road name when showing road name with regard to the rotating Roman character of map display shown in Figure 1 20 usefulness herein further is illustrated.Map video data maker 264 wants to determine the display direction of road name, at first determines to show still that from the starting point direction of road data never tail begins to show.Because the road Identification information corresponding tables shown in a series of bending point coordinate image patterns 2 of demonstration road is arranged like that, thereby map video data maker 264 is selected 2 points from these bending points, during xii+1 ≧ xii, show from the starting point direction of road data, when xii+1＜xii, show from the not tail of road data.Its sure left-to-right demonstration of road name as a result from display frame.And 2 system of selection both can be 2 initial points, also can be starting point and tail not.
Return the explanation of Fig. 1 below.Map video data maker 264 is under the situation that takes place to disturb between the literal of the road name that constitutes road or the symbol, and under the situation of the literal of the road name that constitutes road or other road name generation interference on symbol and the map datum, the literal of avoiding constituting road name or the interference between the symbol and with map datum on other road name take place to disturb in, along road configuration road name.Avoiding constituting the example of disturbing between the literal of road name or the symbol with regard to map display shown in Figure 1 with the tentative storer 255 of video data herein, is illustrated.To be map display shown in Figure 1 with the tentative storer 255 of video data avoid constituting Fig. 6 that the exemplary plot disturbed takes place between the literal of road name or the symbol.
Just as shown in the drawing, map video data maker 264 is being checked when road shows each literal or the interference between each symbol and other literal or the symbol of road name, is presented on the tentative storer 255 of video data.Particularly, map video data maker 264 is in the inclination along the bending point of linking-up road, shows under the situation of the literal that constitutes road name or symbol, when taking place to disturb with the literal of front or symbol, the pixel coverage of display text or symbol moved.For example shown in Figure 6, map video data maker 264 shows after Roman character " C " moved to next pixel coverage under the situation that the pixel coverage of the pixel coverage of Roman character " C " and front Roman character " A, B " takes place to disturb.
In addition, map video data maker 264 rotates under the situation about showing literal or symbol, judge because the rotation of literal or symbol when whether taking place to disturb with other literal or symbol, use judges whether disturb, be set in display data memory 253 and the video data supplementary storage 254 greater than the judgement of the pixel coverage that shows 1 literal or symbol with pixel coverage.The judgement that just map display 20 settings of Fig. 1 are big herein is illustrated with the example of pixel coverage.Fig. 7 is that map display 20 shown in Figure 1 is set the example of judging with pixel coverage.
Just as shown in the drawing, because Roman character is presented in the pixel coverage of (n pixel * n pixel), even thereby map video data maker 264 does not disturb with other literal in order to rotate Roman character arbitrarily yet, the literal of formation road name or the interference between the symbol are judged in envelope zone (m pixel * m pixel) when using Roman character to rotate.N=10 pixel for example, the m=15 pixel.Map video data maker 264 check with the map that has determined to show on the interference of other road name the time, take place by the storage area of the tentative storer 255 of video data and the storage area of video data supplementary storage 254 being compared, judge whether to have to disturb.
As mentioned above, aforementioned map video data maker 264 is at each literal or the symbol that constitute the letter symbol string that shows in the road name, when judging it whether with other literal or symbol-interference, owing to be the judgement literal pixel coverage of utilizing the bigger pixel coverage of the pixel coverage used when being used for showing a literal or symbol, whether judgement takes place to disturb with other literal pixel coverage in this judges with literal pixel model, thereby whether the literal that constitutes the letter symbol string that shows in the road name or symbol are rotated just can judge interference with other literal or symbol, the determining interference processing is easier.
Road name display routine with regard to map display shown in Figure 1 20 is illustrated below.Fig. 8 is the process flow diagram of the road name display routine of expression map display 20 shown in Figure 1.Just as shown in the drawing, map video data maker 264 for show successively with the road name corresponding tables in the road Identification information road corresponding title that keeps, indicator i that will be corresponding with road Identification information is initialized as " i=1 " (step S801).Whether road demonstration determinant 263 is then investigated the i road and is present in by in the display frame zone of map display area resolver 262 decisions (step S802).Consequently, under the situation in the i road is not present in the display frame zone of map display area resolver 262 decision (step S802:NO), map video data maker 264 advances to step S805.
In addition, under the situation of i road in the display frame zone of map display area resolver 262 decisions (step S802:YES), map video data maker 264 is judged the display direction (step S803) of the road name of i road.And the display direction of the road name of i road is selected 2 points from a series of bending point coordinates of i road, during xii+1 ≧ xii, shows from the initial point direction of road data, during xii+1＜xii, shows from the not tail of road data.And map video data maker 264 shows the road name (step S804) of i road.Also have, map video data maker 264 adds 1 (step S805) on the indicator i of road, and whether the data (step S806) of i road are arranged in the investigation road Identification information corresponding tables.
Consequently do not have in the road Identification information corresponding tables under the data conditions of i road (step S806:NO), map video data maker 264 finishes these programs.In addition, under the data conditions that the i road is arranged in the road identifying information corresponding tables (step S806:YES), map video data maker 264 returns step S802, and repeating step S802 is to the program of step S805 before the road name that shows last road.
Further describe the road name display routine of i road shown in Figure 8 below.Fig. 9 is the process flow diagram that further shows the road name display routine of i road shown in Figure 8 in detail.Just as shown in the drawing, the display direction of the road name that map video data maker 264 is obtained from Fig. 8 is observed, and seeks the previous bending point (step S901) that is presented at the bending point in the display frame at first.If initial bending point is in picture (road of interruption etc.), then with this as the initial bending point in the display frame zone.Road name then finally writes in step S915 before the display data memory 253, can be presented on the picture of the tentative storer 255 of video data temporarily.
Also have, map video data maker 264 is set to the display indicator on the picture (step S902) near the previous bending point of the bending point that is presented at first in the display frame.And the indicator k initialization of the literal of the letter symbol string of the road name of map video data maker 264 by will showing the road name corresponding tables or symbol order is set at " k=1 " (step S903).
Also have, in the pixel coverage (n pixel * n pixel) nearby of display indicator that can the scale-of-two map datum of the literal that map video data maker 264 investigation is k number on picture, along the inclination of road, (step S904) do not take place to show intrusively in literal or the symbol with the front.Consequently under the situation that does not take place to show intrusively with the literal or the symbol of front along the inclination of road in the display indicator that k number literal scale-of-two map datum can not be on the picture pixel coverage nearby (step S904:NO), map video data maker 264 makes display indicator move (step S905) along sideways inclined.
And whether map video data maker 264 investigation display indicators cross next bending point (step S906).Map video data maker 264 is being because display indicator is connecting on the line of bending point moves always, thereby is easy to judge arrival or surpassed next bending point.
Consequently display indicator does not surpass under the situation of next bending point (step S906:NO), and map video data maker 264 returns step S906.In addition, display indicator has been crossed under the situation of next bending point (step S906:YES), and map video data maker 264 makes display indicator move to (step S907) near the next bending point.
And whether the bending point that 264 investigation of map video data maker are moved display indicator is last bending point (step S908).The bending point that display indicator is moved is (step S908:YES) under the situation of last bending point, and map video data maker 264 finishes these programs.In addition, not (step S908:NO) under the situation of last bending point when the bending point that display indicator is moved, map video data maker 264 returns step S904.
In addition, under the situation that can not show with the literal or the symbol of front along the inclination of road in the pixel area nearby of the display indicator of scale-of-two map datum on picture of k literal (step S904:YES), map video data maker 264 investigates whether disturb (step S909) with other road name that determines to show with interfering.That is to say fix tentatively the storage area of storer 255 and the storage area of video data supplementary storage 254 by comparing video data, whether investigation is disturbed.Consequently with the noisy situation of other road name that determines to show under (step S909:YES), map video data maker 264 makes display indicator move to (step S910) near the next bending point.
And whether last map video data maker 264 investigation make bending point that display indicator moves bending point (step S911).Its result, the bending point that display indicator is moved is (step S911:YES) under the situation of last bending point, map video data maker 264 finishes these programs.In addition, the bending point that display indicator is moved is not (step S09:NO) under the situation of last bending point, and map video data maker 264 returns step S903, begins display routine again from the initial literal of road name.
In addition, under the situation about not disturbing with other road name that determines to show (step S909:NO), map video data maker 264 is by interim k the literal (step S912) that shows road name in the tentative storer 255 of video data, and indicator k goes up increases by 1 (step S913).And, have or not k literal (step S914) among the road name of map video data maker 264 investigation road name corresponding tables.Investigation result has among the road name of road name corresponding tables under the k literal situation (step S914:YES), and map video data maker 264 returns step S904, and repeating step S904 is to the program of step S913.
In addition, under the situation that does not have the k literal among the road name of road title corresponding tables (step S914:NO), map video data maker 264 will be presented at road name in the tentative storer 255 of video data up to now temporarily and write (step S915) among the display data memory 253.And, be set among the video data supplementary storage 254 behind the pixel coverage expanded scope of map video data maker 264 with road name, so that when next step literal shows, can not produce interference (step S916).
As above-mentioned, among present embodiment 1, the zone of decision displayed map, from the map datum that the map datum distribution server sends, at the road that should in the viewing area of decision, show, obtain bending point coordinate information and name information, each literal of the letter symbol string that display position decision is represented in constituting name information or each symbol are along the position on the road, and on the position of avoiding taking place to disturb, on the position of decision, generate and be used for the map video data of display text or symbol with other letter symbol.Owing to adopted above-mentioned setting, thereby can avoid interference, the easier name information of seeing the demonstration road clearly.
In addition, under the situation that the letter symbol string of representing in the name information only is made of literal that angles of display is rotated or symbol, owing to being set at when making each literal or symbol determine angles of display along road, generation is left-to-right from display frame, show the literal of this kind of formation letter symbol string or the map video data of symbol successively, thereby can see the name information that shows road clearly easilier.
In addition, whether each literal of the letter symbol string of representing in judge constituting name information or symbol be during with other literal or symbol-interference, owing to be set at utilization with in order to show that pixel coverage that a literal or symbol use compares the judgement literal pixel coverage of bigger pixel coverage, whether judgement is disturbed with the pixel of other literal in this judges with literal pixel coverage, thereby can avoid interference the easier name information of seeing the demonstration road clearly.
(embodiment 2)
Though in the situation that has illustrated among the embodiment 1 that map display 20 avoids the road name generation to disturb when road shows road name, but the present invention is not limited thereto, can be equally applicable to the situation that map display 20 avoids same road repeated to show road name.In present embodiment 2, explanatorily map display device 20 avoids same road repeated to show the situation of road name.The part identical with embodiment 1 omitted its explanation.
The formation of the map display system that present embodiment 2 relates at first, is described.Figure 10 is the functional block diagram that the map display system that relates to of expression present embodiment 2 constitutes.Just as shown in the drawing and since with the difference of the functional block diagram of embodiment 1 shown in Figure 1 only be that road name shows Identification Lists, thereby show that with regard to the road name of map display shown in Figure 10 20 Identification Lists 256 is illustrated.Figure 11 is the exemplary plot that the road name of map display 20 shown in Figure 10 shows Identification Lists 256.
Just as shown in the drawing, road name shows that Identification Lists 256 is the tables that are used for discerning among the display data memory 253 whether road name shown.The road name that map video data maker 264 will be presented in the display data memory 253 records among the road name demonstration Identification Lists successively.And map video data maker 264 showed in the Identification Lists 256 there is not identical road name by confirming road name before showing road name, can avoid repeating to show the road name that was once showing.
Just the map display 20 shown in Figure 10 repeats on road to show that the example of road name is illustrated once more herein, and Figure 12 is map display 20 shown in Figure 10 repeats to show road name on road illustration figure.Figure 13 is map display 20 shown in Figure 10 repeats to show road name on road another illustration figure.
As shown in Figure 12, occur because of direct of travel is different under the situation of the expressway of bifurcated and major trunk roads, because same road data is taken as other road, thereby map display 20 shows a plurality of road names on same road.In addition as shown in Figure 13, when the position of wanting to show comprises the grid regions edge (dotting among the figure) of map datum by chance, road is cut apart under the sectional situation by the grid regions edge, because the data of same road are taken as another road and treat, thereby road display equipment 20 shows three road names on same road.So-called grid regions is the unit of cutting apart of the map datum allotted of map datum distribution server 10.In addition,,, also can be taken as other road and treat, be used for showing the processing of road name though then the road in each grid regions is a same road when road is crossed over a plurality of grid regions.
The following describes the road name display routine of map display shown in Figure 10 20.Figure 14 is the process flow diagram of the road name display routine of map display 20 shown in Figure 10.Just as shown in the drawing, map video data maker 264 shows Identification Lists 256 zero clearings (step S1401) with road name when showing road name.
And map video data maker 264 is in order to show successively and the road Identification information road corresponding title that remains in the road name corresponding tables that indicator i that will be corresponding with road Identification information is initialized as " i=1 " (step S1402).Then, road shows determinant 263 investigates in the display frame of map display area resolvers 262 decisions whether i road (step S1403) is arranged.Investigation result is not have in the display frame zone of map display area resolver 262 decision under the situation of this i road (step S1403:NO), and map video data maker 264 advances to step S1408.
In addition, under the situation of i road in the display frame zone of map display area resolver 262 decisions (step S1403:YES), then, map video data maker 264 shows Identification Lists by checking road name, and whether the road name of investigating the i road shows (step S1404).Consequently under the situation that the road name of i road has shown (step S1404:YES), map video data maker 264 advances to step S1408.
In addition, under the situation that the road name of i road does not show (step S1404:NO), map video data maker 264 is judged the display direction (step S1405) of the road name of i roads.Road name is selected 2 points from a series of bending points of i road, during xii+1 ≧ xii, show from the initial point direction of road data, when xii+1＜xii, shows from the not tail of road data.And map video data maker 264 shows the road name (step S1406) of i road.Then, map video data maker 264 road names with the i road write in the road name Identification Lists 256 (step S1407).And map video data maker 264 adds 1 (step S1408) on indicator i, and whether the data (step S1409) of i road are arranged in the investigation road Identification information corresponding tables.
Investigation result is not have in the road Identification information corresponding tables under the data conditions of i road (step S1409:NO), and map video data maker 264 finishes these programs.In addition, under the data conditions that the i road is arranged in the road identifying information corresponding tables (step S1409:YES), map video data maker 264 returns step S1403, and before the road name that shows last road, repeating step S1403 is to the program of step S1408.
As mentioned above, because in present embodiment 2, be set at: before making shows the data of the letter symbol string of representing in the name information corresponding with road along certain road, judge whether to have generated and be used for the data of the letter symbol string in the viewing area of decision, represented in the display Name information, under the situation about having generated, then regeneration is not used for showing the data of the letter symbol string of representing in the road name information, thereby can eliminate and repeat to show, easier see clearly show road name information.
(variation)
The present invention is not limited to the various embodiments described above, also can adopt following illustrative distortion.
(variation 1)
In embodiment 1, the explanation that just can make situation that the literal that shows road name or symbol rotate, but the present invention is not limited thereto is equally applicable to the situation that the literal that shows road name or symbol are rotated in addition.For example, show the road name literal be subjected under the situation of the Chinese character that the operating system restriction can not rotate also applicable.
The letter symbol string that map video data maker 264 shows in road name is under the situation about being made of literal that can not make angles of display commentaries on classics degree or symbol, according to the corresponding inclination angle of the direction that is predetermined of the display frame of road, decision show to constitute the literal or the symbol of this Chinese character number string successively on which direction of display frame, generate according to the direction of decision and be used for the map video data of display text symbol string successively.
Particularly, aforementioned map video data maker 264, under the situation that literal that letter symbol string that road shows nominally can not be rotated by angles of display or symbol constitute, when road is lower than predetermined angular on the horizontal direction of display frame, from left to right show the literal or the symbol that constitute this Chinese character number string, when the predetermined angular on the horizontal direction of road in display frame is above, show the literal or the symbol that constitute this Chinese character number string from top to bottom.
For example, under the situation that the letter symbol string that aforementioned map video data maker 264 shows in road name is made of Chinese character, the inclination angle of road is during with respect to 60 ° of the horizontal direction deficiencies of display frame, from left to right show the literal or the symbol that constitute this Chinese character number string, the inclination angle of road is more than 60 ° the time with respect to the horizontal direction of display frame, shows the literal or the symbol that constitute this Chinese character number string from top to bottom.
Use the Chinese character that can not rotate to show that the example of road name is illustrated with regard to map display shown in Figure 1 20 herein.Figure 15 is that map display 20 shown in Figure 1 uses the Chinese character that can not rotate to show the illustration figure of road name.In addition, Figure 16 is that the map display 20 shown in shown in Figure 1 uses the Chinese character that can not rotate to show the another illustration figure of road name.
As shown in Figure 15, map video data maker 264 is lower than 60 ° owing to pass the inclination angle in " the quiet state street " of display frame central authorities with respect to the horizontal direction of display frame, thereby from the left-to-right demonstration road name of display frame.In addition as shown in figure 16, map video data maker 264 because pass the right-hand member of display frame from top to bottom and the inclination angle in " Mingzhi street " and " hand street, mountain " of left end with respect to the horizontal direction of display frame more than 60 °, thereby from the road name of demonstration top to bottm of display frame.
Road name display routine with regard to map display shown in Figure 1 20 is illustrated below.Figure 17 is the process flow diagram of the road name display routine of expression map display 20 shown in Figure 1.Just as shown in the drawing, map video data maker 264 will to be known corresponding indicator i with the road Identification letter and be initialized as " i=1 " (step S1701) in order to show successively and the road Identification information road corresponding title that remains in the road name corresponding tables.
Then, road shows that determinant 263 investigation i roads are whether in the display frame zone of map display area resolver 262 decisions (step S1702).Investigation result is i road not (step S702:NO) under the situation in map display area is decided the display frame zone of device 262 decision, and map video data maker 264 advances to step S1707.
In addition, under the situation of i road in the display frame zone of map display area resolver 262 decisions (step S1702:YES), then, whether the inclination of map video data maker 264 investigation i roads is lower than the angle of predesignating (step S1703) with respect to the horizontal direction of display frame, investigation result is the horizontal direction under the situation angle predesignated more than (step S1703:NO) of the inclination of i road with respect to display frame, and map video data maker 264 shows road name (step S1704) from top to bottom.For example, the angle of predesignating is meant 60 °.
In addition, the horizontal direction when the inclination angle of i road with respect to display frame is lower than under the situation of the angle of predesignating (step S1703:YES), and map video data maker 264 from left to right shows the road name (step S1705) of i road.And map video data maker 264 road names with the i road write (step S1706) among the display data memory 253.Then, map video data maker 264 adds 1 (step S1707) on indicator i, has or not i road data (step S1708) in the investigation road Identification information corresponding tables.
Investigation result is not have in the road Identification information corresponding tables under the data conditions of i road (step S1708:NO), and map video data maker 264 finishes these programs.In addition, under the data conditions that the i road is arranged in the road identifying information corresponding tables (step S1708:YES), map video data maker 264 returns step S1702, and before the road name that shows last road, repeating step S1702 is to the program of step S1707.
As mentioned above, among variation 1, be set at: under the situation that literal that the letter symbol string of representing in the name information can not be rotated by angles of display or symbol constitute, on which kind of direction of display frame, show literal or the symbol that constitutes this Chinese character number string successively according to the decision of the inclination angle on the direction of predesignating of the display frame of road, direction according to decision, generation is used for showing the map video data of display text symbol string successively, thereby can be according to the different angle of road, switch the display direction of road name, the easier name information of seeing the demonstration traffic route clearly.
In addition, owing to be set at: when the letter symbol string of representing in the name information is under the literal that can not be rotated by angles of display or the symbol situation about constituting, road is with respect to the horizontal direction of display frame, when being lower than predetermined angular, generate from left to right demonstration and constitute the literal of this Chinese character number string or the map video data of symbol, road is with respect to the horizontal direction of display frame during greater than predetermined angular, generate demonstration from top to bottom and constitute the literal of this Chinese character number string or the map video data of symbol, thereby can switch the display direction of road name according to the inclination angle of road, see the name information that shows the traffic route clearly easilier.
(variation 2)
In the various embodiments described above, the CPU of controller implements to comprise the processing of above-mentioned map in being presented at according to the program in the storer such as ROM of being stored in, but also can be by communication lines such as internets, make the program of computer-implemented same processing offer the user with being used for, also can offer the user by among the record matchmaker that this procedure stores can be read by computing machine to CD-ROM (Compact Disc-Read OnlyMemory) etc.Can constitute the map display that to realize above-mentioned functions by the hardware circuit of special use in addition, offer the user.
(industrial prospect)
As mentioned above, the map display that the present invention relates to, map-indication method and ground Figure demonstration program can be used for the guider of mobile body, among the especially portable guider.
Claims (8)
1, a kind of map display, its by network obtain send from the map datum distribution server, comprise that the name information of the bending point coordinate information that is used for showing every traffic route this traffic route and traffic route is at interior map datum, and carry out map according to the map datum of obtaining and show that this map display is characterised in that and comprises:
The viewing area determination device is used to determine the zone of displayed map;
Acquisition device is used for from the map datum by the transmission of aforementioned map data distribution server, at the traffic route that the viewing area planted agent in the decision of aforementioned viewing area determination device shows, obtains aforementioned bending point coordinate information and aforementioned name information; And
Map video data generating apparatus, be used for display position decision at each literal that constitutes the letter symbol string that aforementioned name information represents or each symbol along the position on the traffic route and avoid the position that interferes with other letter symbol, and be created on and be used for the map video data of display text or symbol on the position of decision
Literal or symbol are at random rotated under the situation of demonstration, aforementioned map video data generating apparatus is being judged because the rotation of literal or symbol and when whether interfering with other literal or symbol, use than the big judgement of pixel coverage that shows a literal or symbol to judge whether interfere with pixel coverage.
2, map display according to claim 1, it is characterized in that: under the situation that the letter symbol string that aforementioned map video data generating apparatus is represented in aforementioned name information only is made of rotating literal of angles of display or symbol, determine aforementioned each literal or each symbol angles of display, and generate the left-to-right literal of this Chinese character of formation number string or the map video data of symbol of showing successively from display frame along aforementioned traffic route.
3, map display according to claim 1, it is characterized in that: under the situation that literal that the letter symbol string that aforementioned map video data generating apparatus is represented in aforementioned name information can not be rotated by angles of display or symbol constitute, according to the relative inclination angle of direction that is predetermined with the display frame of traffic route, decision shows literal or the symbol that constitutes this Chinese character number string successively on which direction of display frame, generate to be used for according to the direction that the determines map video data of display text symbol string successively.
4, map display according to claim 3, it is characterized in that: under the situation that literal that the letter symbol string that aforementioned map video data generating apparatus is represented in aforementioned name information can not be rotated by angles of display or symbol constitute, in the traffic route with respect to the horizontal direction of display frame during less than predetermined angular, show the literal or the symbol that constitute this Chinese character number string from left to right, during more than or equal to predetermined angular, show the literal or the symbol that constitute this Chinese character number string with respect to the display frame horizontal direction from top to bottom in the traffic route.
5, map display according to claim 1, it is characterized in that: aforementioned map video data generating apparatus is at each literal or the symbol that constitute the letter symbol string of representing in the aforementioned name information, judge when whether taking place to disturb with other literal or symbol, utilize the judgement literal pixel coverage of the bigger pixel coverage of the pixel coverage used when being used for showing a literal or symbol, whether judgement is disturbed with the pixel coverage of other literal in the literal pixel coverage in this judgement.
6, a kind of map display, be used for by network obtain send from the map datum distribution server, comprise that the name information of the bending point coordinate information that is used for showing every traffic route this traffic route and traffic route is at interior map datum, and carry out map according to the map datum of obtaining and show, this map display is characterised in that, comprising:
The viewing area determination device is used to determine the zone of displayed map;
Acquisition device is used for from the map datum by the transmission of aforementioned map data distribution server, at the traffic route that the viewing area planted agent in the decision of aforementioned viewing area determination device shows, obtains aforementioned bending point coordinate information and aforementioned name information; And
Map video data generating apparatus is used for generating and is used for showing along the traffic route map video data of the letter symbol string that aforementioned name information is represented,
Aforementioned map video data generating apparatus is before making is used for showing the data of the letter symbol string of representing in the name information corresponding with this traffic route along certain traffic route, judge that whether generated the letter symbol string of representing in being used in the viewing area of aforementioned viewing area determination device decision to this name information carries out data presented, under situation about having generated, the letter symbol string that then no longer is used for representing in the name information to this traffic route carries out data presented and generates, in addition, literal or symbol are at random rotated under the situation of demonstration, aforementioned map video data generating apparatus is being judged because the rotation of literal or symbol and when whether interfering with other literal or symbol, use than the big judgement of pixel coverage that shows a literal or symbol to judge whether interfere with pixel coverage.
7, a kind of map-indication method, be used for by network obtain send from the map datum distribution server, comprise that the name information of the bending point coordinate information that is used for showing every traffic route this traffic route and traffic route is at interior map datum, and carry out map according to the map datum of obtaining and show that this map-indication method is characterised in that and comprises:
The viewing area deciding step is used to determine the zone of displayed map;
Obtain step, be used for,, obtain aforementioned bending point coordinate information and aforementioned name information at the traffic route that shows viewing area planted agent by the decision of aforementioned viewing area deciding step from map datum by the transmission of aforementioned map data distribution server; And
The map video data generates step, be used for display position decision at each literal that constitutes the letter symbol string that aforementioned name information represents or each symbol along the position of traffic route and avoid the position that interferes with other letter symbol, generation is used for the map video data of on the position of decision display text or symbol
Generate in the step at the aforementioned map video data, literal or symbol are at random rotated under the situation of demonstration, when judging because the rotation of literal or symbol and when whether interfering, use than the big judgement of pixel coverage that shows a literal or symbol to judge whether interfere with pixel coverage with other literal or symbol.
8, a kind of map-indication method, be used for by network obtain send from the map datum distribution server, comprise that the name information of the bending point coordinate information that is used for showing every traffic route this traffic route and traffic route is at interior map datum, and carry out map according to the map datum of obtaining and show that this map-indication method is characterised in that and comprises:
The viewing area deciding step is used to determine the zone of displayed map;
Obtain step, be used for,, obtain aforementioned bending point coordinate information and aforementioned name information at the traffic route that shows viewing area planted agent by the decision of aforementioned viewing area deciding step from map datum by the transmission of aforementioned map data distribution server; And
The map video data generates step, is used for generating being used for showing the map video data of the letter symbol string that aforementioned name information is represented along the traffic route,
The aforementioned map video data generate making in the step be used for showing the data of the letter symbol string of representing in the name information corresponding along certain traffic route with this traffic route before, judge that whether generated the letter symbol string of representing in being used in by the viewing area of aforementioned viewing area deciding step decision to this name information carries out data presented, under situation about having generated, the letter symbol string that then no longer is used for representing in the name information to this traffic route carries out data presented and generates, generate in the step at the aforementioned map video data in addition, literal or symbol are at random rotated under the situation of demonstration, when judging because the rotation of literal or symbol and when whether interfering, use than the big judgement of pixel coverage that shows a literal or symbol to judge whether interfere with pixel coverage with other literal or symbol.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003351258A JP2005115174A (en) | 2003-10-09 | 2003-10-09 | Device, method, and program for map display |
| JP351258/2003 | 2003-10-09 |
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| CN1864186A CN1864186A (en) | 2006-11-15 |
| CN100507977C true CN100507977C (en) | 2009-07-01 |
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| CNB2004800294739A Expired - Fee Related CN100507977C (en) | 2003-10-09 | 2004-10-01 | Map display device, map display method, and map display program |
Country Status (4)
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| US (1) | US7647168B2 (en) |
| JP (1) | JP2005115174A (en) |
| CN (1) | CN100507977C (en) |
| WO (1) | WO2005036503A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20070021911A1 (en) | 2007-01-25 |
| WO2005036503A1 (en) | 2005-04-21 |
| JP2005115174A (en) | 2005-04-28 |
| CN1864186A (en) | 2006-11-15 |
| US7647168B2 (en) | 2010-01-12 |
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